Identification of Coal Mine Geological Tectonics Based on 3D Seismic Exploration
Quantitative interpretation of fault internal structure based on seismic data is a difficult point for accurate identification of coal mine geological structure.In order to improve the accuracy of fault identification by 3D seismic exploration technology,take Changping coal mine in Shanxi province as an example,establish a fault geological model and carry out seismic orthogonal simulation to determine the intrinsic relationship between different fault models and different fault dips,internal fills and P-wave responses.The fault internal structure index(FIS)of is constructed,and the response characteristics of the fault phase and surrounding rocks to the FIS are observed.The FIS is applied to the seismic data for quantitative interpretation and prediction of the FIS non-uniformity.The test results of the 3D seismic survey show that the FIS response of the fault is higher than the FIS response of the surrounding rocks in the plane,indicating that the former is quantitatively separated from the surrounding rocks.Meanwhile,on the sliding surface,the FIS index indicates the location of densely developed small-scale faults.
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